1) Military rank of Ukraine 
Yesaul, or Osaul ( есау́л jɪsɐˈul), осавул (from Turkic yasaul - chief), a post and a rank in the Ukrainian and Russian Cossack units. The first records of the rank imply that it was introduced by Stefan Batory, King of Poland in 1576. ==Cossacks in Russia== There were different yesaul posts and ranks in Cossack Hosts in Imperial Ru...